TM 9-2320-272-24-4
5-11. ENGINE OIL PUMP REPAIR (Contd)
Press drilled end of idler shaft (3) into gear pocket side of oil pump body (1) with arbor press and
1.
mandrel until idler shaft (3) protrudes 2.604-2.620 in. (66.04-66.55 mm) above back of body.
Press drive gear (5) over drilled end of driveshaft (2) with arbor press and mandrel until driveshaft. (2)
2.
end protrudes 0.040-0.060 in. (1.02-1.52 mm) above drive gear (5) face.
Apply lubricating oil to driveshaft (2) and insert driveshaft (2) into oil pump body (1).
3.
Position 0.012 in. (0.20 mm) shim (4) between back side of drive gear (5) and front of oil pump body (1)
4.
and install drive gear (5) against shim (4) until snug. Remove shim (4).
NOTE
Perform step 5 only if dowel pin was removed during disassembly
procedure.
Install new dowel pin (7) in oil pump body (1) to 0.990-1.010 in. (22.15-25.65 mm) above face.
5.
Install idler gear (10) on idler shaft (3).
6.
Press driven gear (6) on driveshaft (2) with arbor press and mandrel.
7.
Position 0.012 in. (0.30 mm) shim (4) on rear surface of driver gear (6) facing inner body (9) and
8.
position inner body (9) over shafts (2) and (3) so it rests on the shim. Install inner body (9) to seat
driven gear (6) and remove inner body (9) and shim (4).
Apply lubricating oil to gears (6) and (10), shafts (3) and (2), and gear pockets.
9.
Install new gasket (8) and inner body (9) on pump body (1), using soft-faced hammer to seat inner
10.
body (9) on dowel pin (7). Ensure screw holes are open.
NOTE
Perform step 11 only if dowel pin was removed during disassembly
procedure.
Install new dowel pin (11) in inner body (9) to 0.990-1.010 in. (25.15 to 25.65 mm) above face.
11.
Press driven gear (6) on driveshaft (2) with arbor press and mandrel. Leave 0.002-0.004 in.
12.
(0.05-0.10 mm) clearance between bottom of gear pocket and driver gear (6) surface.
Install idler gear (10) on idler shaft (3).
13.
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